Yii Framework 2.0 上传文件错误 finfo_file(): 无法打开流: 没有这样的文件或目录

Following Yii Framework 2.0 documentation http://www.yiiframework.com/doc-2.0/guide-input-file-upload.html I tried to upload image. The image could be uploaded successfully, but after uploading the image, I tried to insert the model into the database with the following code.

 $model->file->saveAs('uploads/' . $model->file->baseName . '.' . $model->file->extension);

 $model->save();

我收到以下错误:

 PHP Warning – yiiaseErrorException

 finfo_file(/tmp/phpIGuwiT): failed to open stream: No such file or directory

 1. in /var/www/html/website/advanced/vendor/yiisoft/yii2/helpers/BaseFileHelper.php
 if ($info) {
        $result = finfo_file($info, $file);
        finfo_close($info);

        if ($result !== false) {
            return $result;
        }
    }

 2. in /var/www/html/my-project/advanced/vendor/yiisoft/yii2/validators/FileValidator.php – yiihelpersBaseFileHelper::getMimeType()
  $mimeType = FileHelper::getMimeType($file->tempName, null, false);

 3.
 4.
 and so on ....

结果是图片已经上传但是模型没有插入到数据库中.有大佬知道怎么解决吗?

$model->save();

$model->file->saveAs()